[all-commits] [llvm/llvm-project] e78a88: [RISCV][P-ext] Make undef vectors Legal. (#210106)

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e78a880505ca0c9ed102fc48100b4cdb280f4e34
      https://github.com/llvm/llvm-project/commit/e78a880505ca0c9ed102fc48100b4cdb280f4e34
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2026-07-16 (Thu, 16 Jul 2026)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVInstrInfoP.td
    M llvm/test/CodeGen/RISCV/rvp-simd-32.ll
    M llvm/test/CodeGen/RISCV/rvp-simd-64.ll

  Log Message:
  -----------
  [RISCV][P-ext] Make undef vectors Legal. (#210106)

Add a few additional isel patterns to avoid false dependencies. We may
want to enable the BreakFalseDep pass in the future.



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